These are military issued IR US flags worn for Friend or Foe identification. The flag is made of material that reflects when viewed under IR light.
My Base Guide - Why Is the Flag Backwards on Military Uniforms?
American Flag Patch
3.5x2 Inch Infrared Multicam Ir Us Flag Patch Us Army Special Forces Green Beret CAG forward or Revered
Military IR Flag Patch, Forward [Genuine Issue]
Genuine IR USA Flag patch. 3.5x2 Infrared reflective, non-fabric Glo-Tape patches with hook backing attaches on military field and flight uniforms to
Reversed Black and Tan Us Ir Infrared USA Flag Military Morale Reflective Patch
PEO Soldier Portfolio - PM SSV - Infrared Retroreflective (IR) Flag
Genuine IR USA Flag patch. 3.5x2 Infrared reflective, non-fabric Glo-Tape patches with hook backing attaches on military field and flight uniforms to
(Set of 2) GEN III The MIL-SPEC Infrared Multicam (OCP) IR Flag Patch Set with Merrow - American Made (Forward and Reverse)
IR.Tools™ GARRISON Infrared IR Forward American US Flag Patch - 3x5 – Offbase Supply Co.
IR United Kingdom Flag Patch, Foliage Green [Genuine Army Issue]
Mil-Spec - 3.5x2 inch Genuine Mil-spec IR material - Ultra High Quality Military Grade durablity REVERSED
Forward OD Green Us IR Infrared Reflective USA Flag Military Morale Uniform (Hook/Loop) Patch
Micro Pro IR USA Flag – PatchPanel
Full Color (white light reflective) US Flag uniform Patch USA Military (choose size) — Empire Tactical USA
3.5 x 2 Reversed Tactical Infrared Reflective US Flag (Ultra Durable) 3M Combat Patch : Sports & Outdoors
The Mil-spec Infrared Multicam (OCP) IR Flag Patch - American Made
3.5 x 2 Reversed Tactical Infrared Reflective US Flag (Ultra Durable) 3M Combat Patch : Sports & Outdoors